Emergency Button Assembly for Handheld Radio
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Solution Overview
Problem
Handheld two-way radios face challenges in providing easily accessible and reliable control buttons for gloved users, particularly in environments where inadvertent actuation and dust accumulation are concerns, due to the tight space constraints and binding issues with larger controls.
Innovation Solution
A push-button control assembly is designed with a housing featuring integrally molded bezels, a light guide acting as an additional alignment post, and a force adder element, positioned along the back between the antenna and channel control knob, allowing off-axis actuation and minimizing dust accumulation, while maximizing space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a larger diameter rotary control is provided for gloved users, then ease of operation is improved, but device complexity and space requirements worsen
Solution Approach 1:
The patent transitions from a traditional side-mounted emergency button to a top-mounted button positioned between the antenna and channel control knob. This dimensional repositioning allows the button to be accessible from the top surface, enabling gloved users to reach it more easily without requiring a larger diameter control on the side where space is constrained.
2Ease of operation
If a larger control button is provided, then ease of operation is improved, but dust accumulation and binding issues worsen
Solution Approach 1:
The patent creates a localized recessed area around the push-button control, forming a bezel structure that contains the button within a defined space. This local structural modification allows the button to be slightly larger for easier gloved operation while preventing dust from accumulating around it, as the recessed design minimizes exposed edges where dust could collect and cause binding.
3Area of stationary object
If controls are tightly located between other radio controls, then space efficiency is improved, but ease of operation and reliability worsen
Solution Approach 1:
The emergency push-button is repositioned to the top surface of the radio housing, in a space between the antenna and channel control knob that would otherwise be unused. This utilizes vertical and lateral space efficiently without requiring additional side space, while the top-mounted position makes it easily accessible to gloved users who can reach over the top of the device.
4Ease of operation
If a larger control button is provided, then ease of operation is improved, but inadvertent actuation worsens
Solution Approach 1:
The push-button is designed with a recessed bezel structure that requires deliberate downward pressure to actuate. The button sits within this recessed area, creating a physical barrier that prevents accidental activation during normal handling, while still allowing intentional activation when needed. The design preliminarily establishes a clear distinction between accidental contact and intentional actuation.
Data Source
AI summary
A push-button assembly for a handheld radio (100) is provided which permits off-axis actuation by a gloved user amongst a crowded radio control environment. The push-button (108) includes first and second guide posts (202, 204) of different length, one guide post also serving as a switch actuator. An alignment guide (206) receives the two guide posts (202, 204). The alignment guide (206) with the first and second guide posts (202, 204) are coupled within a recessed portion (216) of a housing (102) to provide tactile feedback, even during gloved usage. The alignment guide (206) may further provide a light guide (110) which can operate as a third guide post for the radio (100).